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Correlação entre a maturação vertebral cervical e o crescimento mandibular em adolescentes
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Introdução: A avaliação da maturação esquelética e do crescimento craniofacial é fundamental no diagnóstico ortodôntico. Este estudo avalia a correlação entre os estádios de maturação vertebral cervical e o crescimento mandibular em adolescentes, considerando a influência da classe esquelética e posição sagital da mandíbula. Material e métodos: Estudo observacional, analítico, transversal e retrospetivo. A amostra incluiu 115 telerradiografias de perfil de pacientes (10-19 anos) da Clínica Dentária Universitária da UCP. A maturação vertebral cervical foi classificada em seis estádios. O crescimento mandibular foi avaliado pela distância Gonion-Gnathion. A classe esquelética e a posição sagital da mandíbula foram determinadas pelos ângulos ANB e SNB. O erro intraobservador foi avaliado em 30 pacientes. Estudo aprovado pela Comissão de Ética para a Saúde da UCP (Nº119). A análise estatística realizou-se no SPSS (p<0,05). Resultados: A amostra (62 femininos, 53 masculinos; 13,1±2,8 anos) distribuiu-se pelos seis estádios de maturação vertebral cervical e classes I (44,3%), II (41,7%) e III (13,9%). O erro intraobservador foi nulo. O crescimento mandibular foi diferente entre estádios de maturação (p<0,001), sendo inferior nos três primeiros (70,36-71,69mm) e superior nos três últimos (73,50-76,05mm). Verificou-se correlação positiva entre a maturação vertebral cervical e o crescimento mandibular (Rho=0,407; p<0,001), mantendo-se significativa nas três classes, destacando-se na II (Rho=0,433; p=0,002). O crescimento mandibular variou com a classe (p<0,001), sendo menor na II (70,07±4,92mm). O ângulo SNB variou entre estádios (p=0,008), correlacionando-se com o crescimento mandibular (R=0,541; p<0,001). Conclusões: Existe correlação positiva significativa entre a maturação vertebral cervical e o crescimento mandibular. O maior incremento de crescimento mandibular ocorre na transição para o quarto estádio, sugerindo o pico de crescimento, mais precoce no sexo feminino. Embora a classe II apresente menor crescimento mandibular, este acompanha consistentemente a maturação. Estes resultados permitem prever e identificar o momento ideal para intervenções ortopédicas, otimizando o plano terapêutico.
Introduction: The assessment of skeletal maturation and craniofacial growth is fundamental in orthodontic diagnosis. This study evaluates the correlation between cervical vertebral maturation stages and mandibular growth in adolescents, considering the influence of skeletal class and sagittal position of the mandible. Material and methods: Observational, analytical, cross-sectional, and retrospective study. The sample included 115 lateral cephalograms of patients (10-19 years old) from the University Dental Clinic of UCP. Cervical vertebral maturation was classified into six stages. Mandibular growth was assessed by the Gonion-Gnathion distance. Skeletal class and sagittal position of the mandible were determined by the ANB and SNB angles. Intra-observer error was evaluated in 30 patients. The study was approved by the Ethics Committee for Health of the UCP (No. 119). Statistical analysis was performed using SPSS (p<0.05). Results: The sample (62 females, 53 males; 13.1±2.8 years) was distributed across the six cervical vertebral maturation stages and classes I (44.3%), II (41.7%), and III (13.9%). Intra-observer error was null. Mandibular growth differed significantly between maturation stages (p<0.001), being lower in the first three stages (70.36-71.69 mm) and higher in the last three (73.50-76.05 mm). A positive correlation was found between cervical vertebral maturation and mandibular growth (Rho=0.407; p<0.001), remaining significant across all three classes, particularly in II (Rho=0.433; p=0.002). Mandibular growth varied with class (p<0.001), being lower in II (70.07±4.92 mm). The SNB angle varied among stages (p=0.008), correlating with mandibular growth (R=0.541; p<0.001). Conclusions: There is a significant positive correlation between cervical vertebral maturation and mandibular growth. The greatest increment in mandibular growth occurs during the transition to the fourth stage, suggesting the growth peak, occurring earlier in females. Although class II presents less mandibular growth, it consistently accompanies maturation. These results allow for predicting and identifying the ideal timing for orthopaedic interventions, optimizing the treatment plan.
Introduction: The assessment of skeletal maturation and craniofacial growth is fundamental in orthodontic diagnosis. This study evaluates the correlation between cervical vertebral maturation stages and mandibular growth in adolescents, considering the influence of skeletal class and sagittal position of the mandible. Material and methods: Observational, analytical, cross-sectional, and retrospective study. The sample included 115 lateral cephalograms of patients (10-19 years old) from the University Dental Clinic of UCP. Cervical vertebral maturation was classified into six stages. Mandibular growth was assessed by the Gonion-Gnathion distance. Skeletal class and sagittal position of the mandible were determined by the ANB and SNB angles. Intra-observer error was evaluated in 30 patients. The study was approved by the Ethics Committee for Health of the UCP (No. 119). Statistical analysis was performed using SPSS (p<0.05). Results: The sample (62 females, 53 males; 13.1±2.8 years) was distributed across the six cervical vertebral maturation stages and classes I (44.3%), II (41.7%), and III (13.9%). Intra-observer error was null. Mandibular growth differed significantly between maturation stages (p<0.001), being lower in the first three stages (70.36-71.69 mm) and higher in the last three (73.50-76.05 mm). A positive correlation was found between cervical vertebral maturation and mandibular growth (Rho=0.407; p<0.001), remaining significant across all three classes, particularly in II (Rho=0.433; p=0.002). Mandibular growth varied with class (p<0.001), being lower in II (70.07±4.92 mm). The SNB angle varied among stages (p=0.008), correlating with mandibular growth (R=0.541; p<0.001). Conclusions: There is a significant positive correlation between cervical vertebral maturation and mandibular growth. The greatest increment in mandibular growth occurs during the transition to the fourth stage, suggesting the growth peak, occurring earlier in females. Although class II presents less mandibular growth, it consistently accompanies maturation. These results allow for predicting and identifying the ideal timing for orthopaedic interventions, optimizing the treatment plan.
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Palavras-chave
Vértebras cervicais Crescimento Mandíbula Cefalometria Adolescente Cervical vertebrae Growth Mandible Cephalometry Adolescent
Contexto Educativo
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Licença CC
Sem licença CC